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Bonding conductors & EICRs

Many times when I conduct an EICR I find that one of the main bonding conductors is missing, this is usually caused by a property that has had gas central heating installed after the property was originally built and the gas pipe bond was not installed at that time.


A missing bonding conductor results in a c2 on an inspection, meaning that the installation is unsatisfactory. Most people are unaware of what bonding actually is until they have an electrical inspection carried out so here is a basic overview of what the bonding conductor is actually for.


What is bonding?


Bonding is used to reduce the risk of electric shocks to anyone who may touch two separate metal parts when there is a fault somewhere in the supply of electrical installation. By connecting bonding conductors between particular parts, it reduces the voltage there might have been.


The types of bonding generally used are main bonding and supplementary bonding.


Why do earthing and bonding need to be checked?


If you are having an alteration of addition made to your electrical installation, your electrician must check (as well as other things) that the earthing and bonding arrangements you have are up to the required standard.


This is because the safety of any new work you have done (however small) will depend on the earthing and bonding arrangements.


Here is a detailed video by youtube electrician John Ward that explains it perfectly


https://www.youtube.com/watch?v=a5JOTA-mJ4A&ab_channel=JohnWard


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